[Bug 1989596] Re: Completing Copying of Logs stage takes a very long time

[Nick Rosbrook]

The cause of this is that livecd.ubuntu.squashfs contains an
/etc/resolv.conf with private DNS servers (I think it was copied from
the build environment). This is copied to the target chroot, so the call
of `apt-get update` in d-i/source/apt-setup/finish-install.d/10apt-
cdrom-setup[1] repeatedly fails with timeouts, until finally giving up
after 10 minutes or so.

I have not figured out if this is due to a change in the build
environment, or if systemd-resolved packaging changes broke assumptions
in live-build build scripts such as lb_chroot_resolv [2].

[1] https://git.launchpad.net/ubuntu/+source/ubiquity/tree/d-i/source/apt-setup/finish-install.d/10apt-cdrom-setup
[2] https://git.launchpad.net/ubuntu/+source/live-build/tree/scripts/build/lb_chroot_resolv

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Title:
  Completing Copying of Logs stage takes a very long time

Status in ubiquity package in Ubuntu:
  Triaged
Status in ubiquity source package in Kinetic:
  Triaged

Bug description:
  Standard virtualbox install of Ubuntu Budgie daily ISO 14th Sept.  No
  extra options chosen.  Install from live session or just from the
  normal Try screen takes the same amount of time

  It is taking several minutes to complete the Copying of Logs stage.
  This is clearly a regression of 22.04 where this stage takes a second
  or two.

  ProblemType: Bug
  DistroRelease: Ubuntu 22.10
  Package: ubiquity 22.10.6
  ProcVersionSignature: Ubuntu 5.19.0-15.15-generic 5.19.0
  Uname: Linux 5.19.0-15-generic x86_64
  NonfreeKernelModules: zfs zunicode zavl icp zcommon znvpair
  ApportVersion: 2.23.0-0ubuntu1
  Architecture: amd64
  CasperMD5CheckResult: pass
  CasperVersion: 1.474
  CurrentDesktop: Budgie:GNOME
  Date: Wed Sep 14 16:55:44 2022
  InstallCmdLine: BOOT_IMAGE=/casper/vmlinuz file=/cdrom/preseed/ubuntu-budgie.seed maybe-ubiquity quiet splash ---
  LiveMediaBuild: Ubuntu-Budgie 22.10 "Kinetic Kudu" - Alpha amd64 (20220914)
  ProcEnviron:
   TERM=xterm-256color
   PATH=(custom, no user)
   XDG_RUNTIME_DIR=<set>
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  RebootRequiredPkgs: Error: path contained symlinks.
  SourcePackage: ubiquity
  UpgradeStatus: No upgrade log present (probably fresh install)

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